A fan protection device

Abstract

The utility model provides a fan protection device, is equipped with first cavity in the transverse connecting pipe, is equipped with second cavity in the longitudinal connecting pipe, the upper end of longitudinal connecting pipe is fixed in the middle part of transverse connecting pipe, second cavity upper end and first cavity intercommunication, filter is fixed in the right end of transverse connecting pipe and with first cavity intercommunication, mounting plate is fixed in the left end of transverse connecting pipe, telescopic drive subassembly is fixed in the left side of mounting plate, the left end of drive shaft rod is passed mounting plate and is connected with the power output end of telescopic drive subassembly, baffle subassembly is fixed in the right end of drive shaft rod, the right side of second cavity is fixed in transverse connecting pipe and corresponds to the blocking ring. The advantage of the design is that: when the material is switched between conveying and stopping conveying, the fan protection device of the design can realize the switching between negative pressure and non-negative pressure in the storage bin, the fan continues to run in the switching process, the fan does not need to start and stop frequently, and the service life of the fan can be improved.

Description

Technical Field

[0001] This utility model relates to the field of material conveying equipment, and in particular to a fan protection device. Background Technology

[0002] In injection molding equipment, plastic conveying is achieved by using a blower to create negative pressure. Specifically, the plastic conveying system uses the operation of the blower to generate negative pressure, transporting plastic granules from the storage silo to the feed inlet of the production equipment, thus achieving automatic raw material supply. This conveying method has advantages such as high efficiency, stability, energy saving, and environmental protection. It can quickly and stably transport raw materials to the production equipment while keeping the raw materials dry, reducing the impact of moisture, and ensuring production quality and efficiency. However, the blower is usually connected to the storage silo through a conveying pipeline with only a single air inlet. When the conveying of plastic granules stops, the blower needs to be stopped to release the negative pressure. Since plastic granules are generally fed intermittently, the blower needs to be started and stopped intermittently accordingly. However, repeated start-stop of the blower will inevitably shorten its service life. Therefore, it is necessary to develop a blower protection device that can prevent repeated start-stop of the blower to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to provide a fan protection device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A fan protection device includes a transverse connecting pipe, a longitudinal connecting pipe, a filter, a mounting plate, a telescopic drive assembly, a drive shaft, a baffle assembly, and a blocking ring. The transverse connecting pipe contains a first cavity, and the longitudinal connecting pipe contains a second cavity. The upper end of the longitudinal connecting pipe is fixed to the middle of the transverse connecting pipe. The upper end of the second cavity communicates with the first cavity. The filter is fixed to the right end of the transverse connecting pipe and communicates with the first cavity. The mounting plate is fixed to the left end of the transverse connecting pipe. The telescopic drive assembly is fixed to the left side of the mounting plate. The left end of the drive shaft passes through the mounting plate and is connected to the power output end of the telescopic drive assembly. The baffle assembly is fixed to the right end of the drive shaft. The blocking ring is fixed inside the transverse connecting pipe and corresponds to the right side of the second cavity. The left end face of the blocking ring corresponds to the outer peripheral edge of the baffle assembly.

[0006] Further description of this utility model: A first annular groove is provided on the inner wall of the transverse connecting pipe, and a first sealing ring is provided in the first annular groove. The first annular groove corresponds to the right side of the blocking ring. A first threaded hole is also provided on the transverse connecting pipe, and the first threaded hole corresponds to the right side of the first annular groove. An air inlet pipe is provided at the left end of the filter. The air inlet pipe is inserted into the first cavity and its left end abuts against the blocking ring. The inner side of the first sealing ring abuts against the outer wall of the air inlet pipe. The air inlet pipe is fixed to the transverse connecting pipe by a screw connected to the first threaded hole.

[0007] Further description of the present invention: A second annular groove is provided on the inner wall of the longitudinal connecting pipe, a second sealing ring is provided in the second annular groove, and a second threaded hole is also provided on the longitudinal connecting pipe, the second threaded hole corresponding to the lower part of the second annular groove.

[0008] Further description of this utility model: The baffle assembly includes a connecting bushing, a threaded rod, a pressure plate, an elastic washer, and a locking nut. The connecting bushing has a mounting hole on its left side and a third threaded hole communicating with the mounting hole. The right end of the drive shaft corresponds to the mounting hole. The connecting bushing is fixed to the drive shaft by a screw connected to the third threaded hole. The left end of the threaded rod is fixed to the right end of the connecting bushing. The pressure plate is sleeved on the threaded rod and its left end face abuts against the connecting bushing. The elastic washer is sleeved on the threaded rod and its left end face abuts against the right end face of the pressure plate. The locking nut is threadedly connected to the threaded rod and its left end face abuts against the right end face of the elastic washer. The outer peripheral edge of the elastic washer corresponds to the left side of the blocking ring.

[0009] Further description of this utility model: The elastic gasket is made of silicone.

[0010] The beneficial effects of this utility model are as follows: The lower end of the longitudinal connecting pipe is connected to the plastic conveying pipe through a pipeline. The two ends of the plastic conveying pipe are respectively connected to the storage silo and the air inlet of the blower. When conveying plastic granules, the blower needs to create negative pressure in the storage silo. At this time, the telescopic drive assembly moves the drive shaft to the right, thereby pressing the baffle assembly against the blocking ring, thus separating the filter from the longitudinal connecting pipe. The two are not connected to each other, and external gas cannot enter the longitudinal connecting pipe, so that the operating blower can create negative pressure in the storage silo to realize the conveying of plastic. When it is necessary to temporarily stop conveying plastic, the negative pressure in the storage silo needs to be released. At this time, the telescopic drive assembly moves the drive shaft to the left, so that the baffle assembly is no longer pressed against the blocking ring. The filter and the longitudinal connecting pipe are connected to each other. After the external gas passes through the filter to filter out larger particles of impurities, it enters the air inlet of the blower through the longitudinal connecting pipe, so that the blower no longer creates negative pressure in the storage silo, and the conveying of plastic stops. The advantage of this design is that when the material is switched between conveying and stopping, the fan protection device of this design can switch between negative and non-negative pressure in the storage silo. The fan runs continuously during the switching process, eliminating the need for frequent start-stop of the fan and thus improving the service life of the fan. Attached Figure Description

[0011] Figure 1 This is an overall structural diagram of the present invention;

[0012] Figure 2 This is a partial cross-sectional view of the present invention;

[0013] Figure 3 This is a structural diagram of the baffle assembly in this utility model;

[0014] Explanation of reference numerals in the attached figures:

[0015] 1. Horizontal connecting pipe; 11. First cavity; 12. First annular groove; 13. First threaded hole; 2. Longitudinal connecting pipe; 21. Second cavity; 22. Second annular groove; 23. Second threaded hole; 3. Filter; 31. Air inlet pipe; 4. Mounting plate; 5. Telescopic drive assembly; 6. Drive shaft; 7. Baffle assembly; 71. Connecting bushing; 711. Mounting hole; 712. Third threaded hole; 72. Threaded rod; 73. Pressure plate; 74. Elastic washer; 75. Locking nut; 8. Blocking ring. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings:

[0017] like Figures 1 to 3As shown, a fan protection device includes a transverse connecting pipe 1, a longitudinal connecting pipe 2, a filter 3, a mounting plate 4, a telescopic drive assembly 5, a drive shaft 6, a baffle assembly 7, and a blocking ring 8. The transverse connecting pipe 1 has a first cavity 11, and the longitudinal connecting pipe 2 has a second cavity 21. The upper end of the longitudinal connecting pipe 2 is fixed to the middle of the transverse connecting pipe 1. The upper end of the second cavity 21 communicates with the first cavity 11. The filter 3 is fixed to the right end of the transverse connecting pipe 1 and communicates with the first cavity 11. The mounting plate 4 is fixed to the left end of the transverse connecting pipe 1. The telescopic drive assembly 5 is fixed to the left side of the mounting plate 4. The left end of the drive shaft 6 passes through the mounting plate 4 and is connected to the power output end of the telescopic drive assembly 5. The baffle assembly 7 is fixed to the right end of the drive shaft 6. The blocking ring 8 is fixed inside the transverse connecting pipe 1 and corresponds to the right side of the second cavity 21. The left end face of the blocking ring 8 corresponds to the outer peripheral edge of the baffle assembly 7.

[0018] The lower end of the longitudinal connecting pipe 2 is connected to the plastic conveying pipe via a pipeline. The two ends of the plastic conveying pipe are connected to the storage silo and the air inlet of the blower, respectively. When conveying plastic granules, the blower needs to create negative pressure in the storage silo. At this time, the telescopic drive assembly 5 moves the drive shaft 6 to the right, thereby pressing the baffle assembly 7 against the blocking ring 8, thus separating the filter 3 from the longitudinal connecting pipe 2. The two are not connected to each other, and external gas cannot enter the longitudinal connecting pipe 2, so that the operating blower can create negative pressure in the storage silo to realize the conveying of plastic. When it is necessary to temporarily stop conveying plastic, the negative pressure in the storage silo needs to be released. At this time, the telescopic drive assembly 5 moves the drive shaft 6 to the left, so that the baffle assembly 7 is no longer pressed against the blocking ring 8. The filter 3 and the longitudinal connecting pipe 2 are connected to each other. After the external gas passes through the filter 3 to filter out larger particles of impurities, it enters the air inlet of the blower through the longitudinal connecting pipe 2, so that the blower no longer creates negative pressure in the storage silo, and the conveying of plastic stops. The advantage of this design is that when the material is switched between conveying and stopping, the fan protection device of this design can switch between negative and non-negative pressure in the storage silo. The fan runs continuously during the switching process, eliminating the need for frequent start-stop of the fan and thus improving the service life of the fan.

[0019] The inner wall of the transverse connecting pipe 1 is provided with a first annular groove 12, and a first sealing ring is provided in the first annular groove 12. The first annular groove 12 corresponds to the right side of the blocking ring 8. The transverse connecting pipe 1 is also provided with a first threaded hole 13, which corresponds to the right side of the first annular groove 12. The left end of the filter 3 is provided with an air inlet pipe 31, which is inserted into the first cavity 11 and its left end abuts against the blocking ring 8. The inner side of the first sealing ring abuts against the outer wall of the air inlet pipe 31. The air inlet pipe 31 is fixed to the transverse connecting pipe 1 by a screw connected to the first threaded hole 13.

[0020] When installing the filter 3 on the transverse connecting pipe 1, insert the air inlet pipe 31 into the right end of the transverse connecting pipe 1 and pass through the first sealing ring until the air inlet pipe 31 contacts the blocking ring 8. Then tighten the screw in the first threaded hole 13. The inner end of the screw presses against the outer wall of the air inlet pipe 31, thereby quickly fixing the air inlet pipe 31 on the transverse connecting pipe 1 without leakage.

[0021] The inner wall of the longitudinal connecting pipe 2 is provided with a second annular groove 22, and a second sealing ring is provided in the second annular groove 22. The longitudinal connecting pipe 2 is also provided with a second threaded hole 23, which corresponds to the lower part of the second annular groove 22.

[0022] When installing the pipe into the longitudinal connecting pipe 2, the pipe is inserted into the lower end of the longitudinal connecting pipe 2 and passes through the second sealing ring. Then, the screw in the second threaded hole 23 is tightened, and the inner end of the screw is pressed against the outer wall of the pipe, thereby quickly fixing the pipe onto the longitudinal connecting pipe 2 without leakage.

[0023] The baffle assembly 7 includes a connecting bushing 71, a threaded rod 72, a pressure plate 73, an elastic washer 74, and a locking nut 75. The connecting bushing 71 has a mounting hole 711 on its left side and a third threaded hole 712 communicating with the mounting hole 711. The right end of the drive shaft 6 corresponds to the mounting hole 711. The connecting bushing 71 is fixed to the drive shaft 6 by a screw connected to the third threaded hole 712. The left end of the threaded rod 72 is fixed to the right end of the connecting bushing 71. The pressure plate 73 is sleeved on the threaded rod 72 and its left end face abuts against the connecting bushing 71. The elastic washer 74 is sleeved on the threaded rod 72 and its left end face abuts against the right end face of the pressure plate 73. The locking nut 75 is threadedly connected to the threaded rod 72 and its left end face abuts against the right end face of the elastic washer 74. The outer peripheral edge of the elastic washer 74 corresponds to the left side of the blocking ring 8.

[0024] The connecting bushing 71 can be quickly installed at the end of the drive shaft 6 by screws. The elastic washer 74 and the pressure plate 73 are pressed to the left by the locking nut 75, thereby fixing the elastic washer 74 and the pressure plate 73. When negative pressure needs to be generated, the elastic washer 74 is pressed on the blocking ring 8. The elastic washer 74 can fit tightly with the blocking ring 8, and it is not easy to leak air.

[0025] The elastic gasket 74 is made of silicone. Silicone has excellent high-temperature resistance and strong chemical stability.

[0026] The above does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A fan protection device, characterized in that: The device includes a transverse connecting pipe, a longitudinal connecting pipe, a filter, a mounting plate, a telescopic drive assembly, a drive shaft, a baffle assembly, and a blocking ring. The transverse connecting pipe contains a first cavity, and the longitudinal connecting pipe contains a second cavity. The upper end of the longitudinal connecting pipe is fixed to the middle of the transverse connecting pipe. The upper end of the second cavity communicates with the first cavity. The filter is fixed to the right end of the transverse connecting pipe and communicates with the first cavity. The mounting plate is fixed to the left end of the transverse connecting pipe. The telescopic drive assembly is fixed to the left side of the mounting plate. The left end of the drive shaft passes through the mounting plate and connects to the power output end of the telescopic drive assembly. The baffle assembly is fixed to the right end of the drive shaft. The blocking ring is fixed inside the transverse connecting pipe and corresponds to the right side of the second cavity. The left end face of the blocking ring corresponds to the outer peripheral edge of the baffle assembly.

2. The fan protection device according to claim 1, characterized in that: The inner wall of the transverse connecting pipe is provided with a first annular groove, and a first sealing ring is provided in the first annular groove. The first annular groove corresponds to the right side of the blocking ring. The transverse connecting pipe is also provided with a first threaded hole, which corresponds to the right side of the first annular groove. The left end of the filter is provided with an air inlet pipe, which is inserted into the first cavity and its left end abuts against the blocking ring. The inner side of the first sealing ring abuts against the outer wall of the air inlet pipe. The air inlet pipe is fixed to the transverse connecting pipe by a screw connected to the first threaded hole.

3. The fan protection device according to claim 1, characterized in that: The inner wall of the longitudinal connecting pipe is provided with a second annular groove, and a second sealing ring is provided in the second annular groove. The longitudinal connecting pipe is also provided with a second threaded hole, which corresponds to the lower part of the second annular groove.

4. A fan protection device according to claim 1, characterized in that: The baffle assembly includes a connecting bushing, a threaded rod, a pressure plate, an elastic washer, and a locking nut. The connecting bushing has a mounting hole on its left side and a third threaded hole communicating with the mounting hole. The right end of the drive shaft corresponds to the mounting hole. The connecting bushing is fixed to the drive shaft by a screw connected to the third threaded hole. The left end of the threaded rod is fixed to the right end of the connecting bushing. The pressure plate is sleeved on the threaded rod, with its left end face abutting against the connecting bushing. The elastic washer is sleeved on the threaded rod, with its left end face abutting against the right end face of the pressure plate. The locking nut is threadedly connected to the threaded rod, with its left end face abutting against the right end face of the elastic washer. The outer peripheral edge of the elastic washer corresponds to the left side of the blocking ring.

5. A fan protection device according to claim 4, characterized in that: The elastic gasket is made of silicone.

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